List of top Biotechnology Questions on Gene transfer technologies asked in CBSE CLASS XII

Mention the important features that were incorporated in each of the following vectors:
(i) COSMIDS
(ii) Shuttle Vectors
(iii) Expression Vectors
Absence of the enzyme adenosine deaminase in humans causes:
A biotechnologist wants to obtain a gene sequence in single stranded form. Which bacteriophage based vector should he choose to obtain the desired result?